China just made grid-scale battery storage significantly more affordable — activating the world's largest sodium-ion grid storage installation across six provinces, storing 8,000 megawatt-hours of surplus solar and wind electricity using battery chemistry that costs 40 percent less per kilowatt-hour than lithium-ion and carries zero risk of thermal runaway fire.
Sodium-ion batteries use abundant sodium salt as the charge-carrying ion instead of scarce lithium, eliminating supply chain dependency on lithium mining concentrated in just three countries worldwide. Chinese manufacturer CATL developed cells achieving 160 watt-hours per kilogram energy density — approaching lithium-ion performance — while operating safely from minus 40 to plus 80 degrees Celsius without cooling systems. Manufacturing uses standard lithium-ion production equipment with minor modifications, enabling rapid factory conversion at scale.
The six-province installation draws surplus renewable electricity during midday solar peaks and discharges during evening demand periods, reducing coal plant utilization equivalent to 3 million tonnes of CO2 annually. China has approved 50,000 megawatt-hours of additional sodium-ion storage contracts, signaling a full industrial transition away from lithium dependency for all grid applications.
Source: CATL Contemporary Amperex Technology China, State Grid Corporation of China, Chinese National Energy Administration, 2025
Geen opmerkingen:
Een reactie posten